public StringBuilder StartTracking(String time, int frameCount, StringBuilder csvLogger)
{
// Get Eye data from TOBI API
TobiiXR_EyeTrackingData localEyeData = TobiiXR.GetEyeTrackingData(TobiiXR_TrackingSpace.Local);
TobiiXR_EyeTrackingData worldEyeData = TobiiXR.GetEyeTrackingData(TobiiXR_TrackingSpace.World);
// Get Eye data from SRNipal
ViveSR.Error error = SRanipal_Eye_API.GetEyeData(ref _eyeData);
if (error == Error.WORK)
{
_sRanipalEyeVerboseData = _eyeData.verbose_data;
// Left Eye Data
SingleEyeData sRleftEyeData = _sRanipalEyeVerboseData.left;
// Right Eye
SingleEyeData sRrightEyeData = _sRanipalEyeVerboseData.right;
// Write in the CSV file
csvLogger.AppendFormat(
"{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10}, {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}," +
"{19}, {20}, {21}, {22}, {23}, {24}, {25},{26}, {27}, {28}, {29}, {30}, {31}, {32}, {33}, {34}, {35}," +
"{36}, {37}, {38}, {39}",
// Time and Frame count
time, frameCount,
// Convergence Distance
worldEyeData.ConvergenceDistanceIsValid,
worldEyeData.ConvergenceDistance,
// Eye Openness
sRleftEyeData.eye_openness,
sRrightEyeData.eye_openness,
// Eye blinking
localEyeData.IsLeftEyeBlinking,
localEyeData.IsRightEyeBlinking,
// Pupil Diameter
sRleftEyeData.pupil_diameter_mm,
sRrightEyeData.pupil_diameter_mm,
// Pupil Position in Sensor area (x, y)
sRleftEyeData.pupil_position_in_sensor_area.x,
sRleftEyeData.pupil_position_in_sensor_area.y,
sRrightEyeData.pupil_position_in_sensor_area.x,
sRrightEyeData.pupil_position_in_sensor_area.y,
// IS local Gaze Valid
localEyeData.GazeRay.IsValid,
// Local Space Gaze Origin Combined
localEyeData.GazeRay.Origin.x,
localEyeData.GazeRay.Origin.y,
localEyeData.GazeRay.Origin.z,
// Local Space Gaze Direction Combined
localEyeData.GazeRay.Direction.x,
localEyeData.GazeRay.Direction.y,
localEyeData.GazeRay.Direction.z,
// IS World Gaze Valid
worldEyeData.GazeRay.IsValid,
//world space Gaze Origin Combined
worldEyeData.GazeRay.Origin.x,
worldEyeData.GazeRay.Origin.y,
worldEyeData.GazeRay.Origin.z,
// world space Gaze Direction Combined
worldEyeData.GazeRay.Direction.x,
worldEyeData.GazeRay.Direction.y,
worldEyeData.GazeRay.Direction.z,
// Gaze Origin in mm
sRleftEyeData.gaze_origin_mm.x,
sRleftEyeData.gaze_origin_mm.y,
sRleftEyeData.gaze_origin_mm.z,
sRrightEyeData.gaze_origin_mm.x,
sRrightEyeData.gaze_origin_mm.y,
sRrightEyeData.gaze_origin_mm.z,
// Normalized Gaze direction
sRleftEyeData.gaze_direction_normalized.x,
sRleftEyeData.gaze_direction_normalized.y,
sRleftEyeData.gaze_direction_normalized.z,
sRrightEyeData.gaze_direction_normalized.x,
sRrightEyeData.gaze_direction_normalized.y,
sRrightEyeData.gaze_direction_normalized.z
);
csvLogger.AppendLine();
}
return(csvLogger);
}
// ********************************************************************************************************************
//
// Callback function to record the eye movement data.
// Note that SRanipal_Eye_v2 does not work in the function below. It only works under UnityEngine.
//
// ********************************************************************************************************************
private static void EyeCallback(ref EyeData_v2 eye_data)
{
EyeParameter eye_parameter = new EyeParameter();
SRanipal_Eye_API.GetEyeParameter(ref eye_parameter);
eyeData = eye_data;
// ----------------------------------------------------------------------------------------------------------------
// Measure eye movements at the frequency of 120Hz until framecount reaches the maxframe count set.
// ----------------------------------------------------------------------------------------------------------------
while (cnt_callback < maxframe_count)
{
ViveSR.Error error = SRanipal_Eye_API.GetEyeData_v2(ref eyeData);
if (error == ViveSR.Error.WORK)
{
// --------------------------------------------------------------------------------------------------------
// Measure each parameter of eye data that are specified in the guideline of SRanipal SDK.
// --------------------------------------------------------------------------------------------------------
MeasureTime = DateTime.Now.Ticks;
time_stamp = eyeData.timestamp;
frame = eyeData.frame_sequence;
eye_valid_L = eyeData.verbose_data.left.eye_data_validata_bit_mask;
eye_valid_R = eyeData.verbose_data.right.eye_data_validata_bit_mask;
openness_L = eyeData.verbose_data.left.eye_openness;
openness_R = eyeData.verbose_data.right.eye_openness;
pupil_diameter_L = eyeData.verbose_data.left.pupil_diameter_mm;
pupil_diameter_R = eyeData.verbose_data.right.pupil_diameter_mm;
pos_sensor_L = eyeData.verbose_data.left.pupil_position_in_sensor_area;
pos_sensor_R = eyeData.verbose_data.right.pupil_position_in_sensor_area;
gaze_origin_L = eyeData.verbose_data.left.gaze_origin_mm;
gaze_origin_R = eyeData.verbose_data.right.gaze_origin_mm;
gaze_direct_L = eyeData.verbose_data.left.gaze_direction_normalized;
gaze_direct_R = eyeData.verbose_data.right.gaze_direction_normalized;
gaze_sensitive = eye_parameter.gaze_ray_parameter.sensitive_factor;
frown_L = eyeData.expression_data.left.eye_frown;
frown_R = eyeData.expression_data.right.eye_frown;
squeeze_L = eyeData.expression_data.left.eye_squeeze;
squeeze_R = eyeData.expression_data.right.eye_squeeze;
wide_L = eyeData.expression_data.left.eye_wide;
wide_R = eyeData.expression_data.right.eye_wide;
distance_valid_C = eyeData.verbose_data.combined.convergence_distance_validity;
distance_C = eyeData.verbose_data.combined.convergence_distance_mm;
track_imp_cnt = eyeData.verbose_data.tracking_improvements.count;
////track_imp_item = eyeData.verbose_data.tracking_improvements.items;
// Convert the measured data to string data to write in a text file.
string value =
MeasureTime.ToString() + "," +
time_stamp.ToString() + "," +
frame.ToString() + "," +
eye_valid_L.ToString() + "," +
eye_valid_R.ToString() + "," +
openness_L.ToString() + "," +
openness_R.ToString() + "," +
pupil_diameter_L.ToString() + "," +
pupil_diameter_R.ToString() + "," +
pos_sensor_L.x.ToString() + "," +
pos_sensor_L.y.ToString() + "," +
pos_sensor_R.x.ToString() + "," +
pos_sensor_R.y.ToString() + "," +
gaze_origin_L.x.ToString() + "," +
gaze_origin_L.y.ToString() + "," +
gaze_origin_L.z.ToString() + "," +
gaze_origin_R.x.ToString() + "," +
gaze_origin_R.y.ToString() + "," +
gaze_origin_R.z.ToString() + "," +
gaze_direct_L.x.ToString() + "," +
gaze_direct_L.y.ToString() + "," +
gaze_direct_L.z.ToString() + "," +
gaze_direct_R.x.ToString() + "," +
gaze_direct_R.y.ToString() + "," +
gaze_direct_R.z.ToString() + "," +
gaze_sensitive.ToString() + "," +
frown_L.ToString() + "," +
frown_R.ToString() + "," +
squeeze_L.ToString() + "," +
squeeze_R.ToString() + "," +
wide_L.ToString() + "," +
wide_R.ToString() + "," +
distance_valid_C.ToString() + "," +
distance_C.ToString() + "," +
track_imp_cnt.ToString() +
//track_imp_item.ToString() +
Environment.NewLine;
File.AppendAllText("StandardSaccade_" + UserID + ".txt", value);
cnt_callback++;
}
// Break while loop 3 seconds after the saccade tasks are completed. We know the timing at this point by time information.
CurrentTime = DateTime.Now.Ticks;
MeasureEndTime = GetSaccadeEndTime();
if ((CurrentTime - MeasureEndTime > 3 * 10000000) && MeasureEndTime != 0)
{
break;
}
}
}